docs: def put_encryption_materials(self, cache_key, encryption_materials, plaintext_length, entry_hints=None):
          """Does not add encryption materials to the cache since there is no cache to which to add them.
  
          :param bytes cache_key: Identifier for entries in cache
          :param encryption_materials: Encryption materials to add to cache
          :type encryption_materials: aws_encryption_sdk.materials_managers.EncryptionMaterials
          :param int plaintext_length: Length of plaintext associated with this request to the cache
          :param entry_hints: Metadata to associate with entry (optional)
          :type entry_hints: aws_encryption_sdk.caches.CryptoCacheEntryHints
          :rtype: aws_encryption_sdk.caches.CryptoMaterialsCacheEntry
          """
          return CryptoMaterialsCacheEntry(cache_key=cache_key, value=encryption_materials)